干旱区生态环境知识资源中心(Arid): Solar-induced chlorophyll fluorescence sheds light on global evapotranspiration

Arid

DOI	10.1016/j.rse.2024.114061
	Solar-induced chlorophyll fluorescence sheds light on global evapotranspiration
	Zhang, Quan; Liu, Xuanqi; Zhou, Kai; Zhou, Yang; Gentine, Pierre; Pan, Ming; Katul, Gabriel G.
通讯作者	Zhang, Q
来源期刊	REMOTE SENSING OF ENVIRONMENT
ISSN	0034-4257
EISSN	1879-0704
出版年	2024
卷号	305
英文摘要	The significance of large-scale evapotranspiration (ET) to climate science, water resources management, flood routing, irreversible desertification, and crop yield is not in dispute. Current large-scale ET models combine empirical formulations with a suite of remotely sensed data products that include meteorological variables, vegetation indices and/or soil moisture. In recent years, solar-induced chlorophyll fluorescence (SIF) has been proposed as an indicator of photosynthetic activity but its potential to constrain transpiration (T-r) or ET remains under-explored and frames the scope here. A large-scale terrestrial ET model driven by SIF is developed based on leaf water-carbon exchange complemented with an outcome for intercellular to ambient CO2 concentration derived from optimality theory for stomatal conductance. The model parameters are first calibrated across FLUXNET sites and then extrapolated globally using their dependence on climatic variables and plant functional types. The model, hereafter referred to as ETSIF, requires SIF data, leaf area index, land use type, and basic meteorological variables that include net radiation, air temperature and relative humidity. Global ETSIF estimates computed on a 4-day window for the period spanning 2003 to 2018 was 625 mm yr(-1) in general agreement with other independent global ET estimates, but discrepancy in the spatial distribution still exists implying that global ET estimation remains subject to large uncertainty. ETSIF exhibited a tantalizing positive trend over the same period but this trend was not statistically significant. One of the major advantages of this new approach, is that the model requires few parameters, reduce the parameterization of stomatal conductance and can be immediately used to constrain spatially extended ET estimates.
英文关键词	Evapotranspiration Optimal stomatal conductance theory Solar-induced fluorescence Water-carbon relations Global hydrological cycle
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001208417000001
WOS关键词	VAPOR-PRESSURE DEFICIT ; MAXIMUM CARBON GAIN ; SURFACE-ENERGY ; TERRESTRIAL EVAPOTRANSPIRATION ; SATELLITE MEASUREMENTS ; RAINFALL INTERCEPTION ; STOMATAL CONDUCTANCE ; WATER ; VEGETATION ; LEAF
WOS类目	Environmental Sciences ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405332
推荐引用方式 GB/T 7714	Zhang, Quan,Liu, Xuanqi,Zhou, Kai,et al. Solar-induced chlorophyll fluorescence sheds light on global evapotranspiration[J],2024,305.
APA	Zhang, Quan.,Liu, Xuanqi.,Zhou, Kai.,Zhou, Yang.,Gentine, Pierre.,...&Katul, Gabriel G..(2024).Solar-induced chlorophyll fluorescence sheds light on global evapotranspiration.REMOTE SENSING OF ENVIRONMENT,305.
MLA	Zhang, Quan,et al."Solar-induced chlorophyll fluorescence sheds light on global evapotranspiration".REMOTE SENSING OF ENVIRONMENT 305(2024).